66550127 has 4 divisors (see below), whose sum is σ = 76057296. Its totient is φ = 57042960.

The previous prime is 66550117. The next prime is 66550151. The reversal of 66550127 is 72105566.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66550127 - 2²² = 62355823 is a prime.

It is a super-2 number, since 2×66550127² = 8857838807432258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66550093 and 66550102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66550117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4753574 + ... + 4753587.

It is an arithmetic number, because the mean of its divisors is an integer number (19014324).

Almost surely, 2^66550127 is an apocalyptic number.

66550127 is a deficient number, since it is larger than the sum of its proper divisors (9507169).

66550127 is an equidigital number, since it uses as much as digits as its factorization.

66550127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9507168.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 66550127 is about 8157.8261197454. The cubic root of 66550127 is about 405.2437226310.

The spelling of 66550127 in words is "sixty-six million, five hundred fifty thousand, one hundred twenty-seven".